CI/SfB (47) Nh2

July 2004

Secret Fix SF500

Technical

Specifications

1

Contents

System Benefits 2

Services 2

Applications, Aesthetics

Weatherability and Standard Details 3

Durability/Warranties, Quality

and On-site Manufacture 4

SF500 Profile and Load/Span Considerations 5

Curving, Lateral Restraint,

Thermal Expansion and Steelwork 6

Fire 7

Typical Constructions 8

Vapour Control, Breather Membranes,

Air Permeability and Insulation 9

Unloading and Handling,

Site Storage and Lifting 10

Use of Tools 11

Standard Components 12

Fixings 13

Setting Out 14

Fixing Verge Section

(Starter and End Details) 15

Ridge Detail 16

Eaves Gutter Detail 17

Valley Gutter Detail 18

Hip Detail 19

Hip Valley Gutter Detail 20

Rooflights 21

Roof Access, Fall Arrest Systems

and Latchways 22

Roof Penetrations 23

Roof Step 24

Replacing Damaged Sheet 25

On-Site Production 26

Secret Fix SF500

Introduction

Euroclad Ltd is one of the UK’s foremost

producers of metal cladding systems.

Continuous development is specifically

geared towards offering Architects and

Specifiers the ultimate choice in design

flexibility. The range of products available,

developed over 20 years, allows

multi-performance specification covering

the whole building envelope in a wide

range of materials.

Secret Fix SF500 is a case in point,

giving the Specifier and Contractor a

proven and simple system to use for low

pitch roof applications, where speed of

fixing and guaranteed performance are

required and continuity of finish, colour

and material choice are paramount.

SF500 has been specifically designed to

function at design pitches down to 2.5°

(minimum actual pitch 1°), with no

external penetration of the sheet, no end

laps and low maintenance performance.

Manufactured predominantly in HPS200

coated steel, the system offers many of

the advantages of a true standing seam

system, but is simpler to install and may

be more simply integrated into projects

where the material of choice is steel

rather than aluminium.

3

Applications

SF500 has been used in educational, commercial,

retail, industrial and leisure applications amongst

others. The system is suitable for new build,

refurbishment, over-roofing and flat to pitch

conversion and can be considered as a viable

alternative to sealed membrane, felt or asphalt

systems.

The ability to produce the sheets on site, in

single lengths and the simple ‘snap fix’ overlap

gives SF500 its greatest advantages over other

systems designed for low pitch application.

Aesthetics

SF500 has low visual impact allowing clean,

uncluttered roof lines.

Standard stock materials in a wide range of

colours in HPS200, PVDF, Leathergrain Plastisol

along with Aluzinc can be used. Standard colour

charts are available from Euroclad and are

included in the Roofing and Cladding Manual.

Weatherability

SF500 provides superb weathering performance

through a precision engineered snap fit 55mm

overlap. The underlap is designed to take a

3mm bead mastic seal, whilst the low profile

pan allows excellent drainage at low pitch.

2

System Benefits

• BBA assessed performance

• No external fixings

• Long sheet length allowing end-lap free construction

• Sheet fixed directly to structure with no separate clips or brackets

• Drive-on-drive-off manufacture if required,reducing transport and crane costs

• Fast installation

• Short lead times

• Range of cost effective standardaccessories

• Confidex Guarantees on HPS200 material

• Extensive Stocks of materials

• Robust profile

• Full integration with Euroclad Liner Paneland associated products

• Comprehensive range of related services

Services

Euroclad offers specifiers a broad spectrum

of support from initial enquiry and bespoke

technical consultation to project realisation.

NBS draft specifications are provided for all

standard constructions and can be tailored to

suit project performance requirements through

consultation.

This service draws on Euroclad experience and

the flexibility of built-up systems, to respond to

individual requirements for specific thermal,

acoustic, structural and other performance

considerations.

Euroclad can provide specific advice to help

design a wide range of features that enhance

basic concepts. This allows full integration of

the roof construction with flashings and bespoke

fabrications as well as composite or twin-skin

wall cladding.

Euroclad products are supported through RIBA

Information Services with full coverage in NBS

Plus, On-line Services and Product Selectors.

Euroclad has RIBA CPD Providers Network and

RIAI approval.

Secret Fix SF500

Single eaves-to-eaves or ridge-to-eaves sheet

lengths with no end laps and no external fixings

penetrating the sheet, along with on-site

manufacture, means that sheet lengths are

effectively limited only by handling requirements.

Carefully designed accessories and details

ensure no compromise of performance.

The structurally tested system and longevity

of materials provide long-term security.

Standard Details

A CD-ROM of Standard Construction Details

modelled for performance under the Building

Regulations is available on request.

Euroclad provides systems which can be

modelled in house on state-of-the-art

3 dimensional software to be compliant with

Part L2 of the Building Regulations.

This facility can be used as easily for details

as it is for plane elements.

There are inevitably cases where a one-off,

bespoke detail is required for a particular

situation. In these circumstances, Euroclad

will provide relevant advice.

Standard component drawings and construction

details are shown in this brochure along with a

basic component list and other useful information.

Further assistance may be obtained from the

Euroclad Technical Department.

5Load/Span Considerations

The responsibility for defining and specifying wind

loads and purlin centres lies with the structural

engineer for the project. Wherever possible the

loads should be determined while the adjustment

of purlin centres is still possible, allowing the

chosen roof profiles performance to be taken

into account. BS 6399 pt 2 should be used to

establish local and general wind pressures.

The new Eurocode EN 1991- 1-4: Wind Actions

is currently in the process of being introduced.

It is anticipated that the final results derived from

this standard will be essentially the same as

those reached using BS 6399. CP3 chapter

5 pt 2: 1972 and its amendments was declared

obsolete in 1998 and was due for full withdrawal

June 2001.

View of SF500 Profile

4

Durability and Warranties

The Confidex Guarantee is available for all SF500

supplied in Corus HPS200 material. Full details

are available in the Roofing and Cladding Manual.

The majority of colours used for roof applications

can achieve CD1 status under the Guarantee.

BBA Certification covering standard

constructions is due for issue in the near future.

Latent Defects Insurance is available for

all Euroclad products covering design,

workmanship and materials and is the most

comprehensive cover, available.

Elite Warranty System

Euroclad offers a 25-year warranty on all

components of the fully warranted roofing and

cladding systems manufactured or approved by

Euroclad. The building designer and owner can

therefore be confident the system specified will

be installed by Euroclad’s ‘Elite

Contractor Network’ to the highest

standard. Please consult the

Euroclad Technical Department for specification

of the systems and their installation procedures.

Quality Assured

Euroclad’s commitment to quality and service

is reflected in it’s ISO 9001:2000 Quality

Management System which ensures that

systems are in place from manufacture to after

sales service. The company is

also accredited with ISO14001,

demonstrating its commitment

to the environment.

Euroclad interfaces with the industry in a way

which has earned a reputation for service and

flexibility that is second to none.

Euroclad works closely with the industry to

ensure that high standards are achieved and

regularly contributes to industry development

on issues such as amendments to the Building

Regulations, fire in construction and fragility

testing of steel liners and all pertinent subjects.

On-site Manufacture

Normal delivery by road can be achieved for

sheet lengths up to 14 metres. Road haulage

can be arranged for lengths up to 28 metres,

however, it is usually preferable to have the

sheets rollformed on site.

Transporting very long sheets can be a costly

and time consuming business involving

requests for movement documentation, police

escorts etc but Euroclad’s mobile rollforming

capability can obviate these problems.

By rollforming from a trailer which is self

contained and drives on and off the site,

problems such as limited access, high transport

costs, extended lead time due to transport

permits and potential damage during transit

are removed.

Euroclad will carry out pre-manufacture

assessment visits to ensure that everything runs

to plan and can provide method statements,

lifting beam certificates and advice for each

project on request.

Straight sheets can be rolled at an impressive

rate of 3000 linear metres per day and may

either be rolled up a ramp directly onto the roof

structure or lifted by crane, which can be

co-ordinated with the manufacture to

minimise costs.

Secret Fix SF500

500mm cover width

Colour side

52 54

500500

colour side

The tables below have been set out to allow the designer to look up Span against Load.

Load Span Table

SF500 Load Spans

Loads in kn/m2 double/multispan for 0.7mm thickness

Note: Imposed Deflection Limit = L/250 Weight per linear metre = 3.870 KGS (0.7mm)Suction Deflection Limit = L/150 Weight per square metre = 7.741 KGS (0.7mm)

Span (M) 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0

New Imposed (Factor 1.6) 4.75 4.48 4.15 3.92 3.65 3.38 3.11 2.91 2.70 2.43 2.22

New Suction (Factor 1.4) 4.27 4.00 3.62 3.11 2.70 2.25 2.11 1.98 1.84 1.75 1.63

New Imposed (Factor 2.0) 3.80 3.58 3.32 3.13 2.92 2.71 2.49 2.33 2.16 1.95 1.78

New Suction (Factor 2.0) 2.99 2.80 2.53 2.18 1.89 1.58 1.47 1.38 1.29 1.23 1.14

The maximum permissible cantilever for SF500 sheet is 300mm.

7

BS 476 Part 3: External fire exposure roof test

Roofs are graded according to the length of time

they resist fire from the outside (e.g. fire in an

adjacent building) and the distance of superficial

spread of flame on the outside surface.

The ‘Part 3’ test procedure has to be performed

on a section of roof structure and it is not just

a test of material. There is no reason why a

properly built pitched roof constructed of Corus

organic and metallic coated steels should not

achieve the top classification, AA. The Building

Regulations designate profiled sheets of

galvanised steel and PVC and PVF2 organic

coated steels as grade AA. Other shapes and

other Corus coatings on steel are entirely within

the spirit of the Regulations and may be

regarded as satisfactory.

BS 476 Part 4: Combustibility

Either a material burns or it does not, there are

no intermediate degrees. All Corus metallic

coated sheets, such as Galvatite hot-dip

galvanised steel or Zalutite, are deemed ‘non-

combustible’. Organic coated steels such as

Colorcoat have to be further assessed.

BS 476 Part 6: Propagation

This is a test which assesses the rate of heat

release of a material in burning, by means of a

standard procedure. This measures the total

heat given off by a material over a period of

twenty minutes expressed as an index of

performance, I, calculated from an empirical

formula contained in the standard. In addition,

the initial heat given off over shorter periods –

expressed as the sub-indices i1, i2, and i3 –

is also assessed. All Corus coated steels have

indices of performance, I, not exceeding 12

and i1 (first 3 mins) not exceeding 6, which have

particular significance in relation to Building

Regulation requirements.

BS 476 Part 7: Surface spread of flame

This test grades materials in Classes 1 down

to 4 in descending order of ranking. Test

certificates are available for the Colorcoat range

of products whichconfirm compliance with

Class 1.

BS 476 Parts 21 and 22:Fire resistance of elements ofconstruction

These tests are designed to assess the

performance of complete elements. These

should remain stable, resist penetration of flame

and hot gases and limit the transfer of heat from

one side to the other for the fire resistance

period required, usually 1/2, 1, 11/2 or 2 hours.

Steel sheet cladding alone is given a zero rating

in terms of fire resistance and would therefore

be classified as an ‘unprotected area’ in the

context of the Building Regulations. When used

in conjunction with suitable insulating materials,

the required degree of fire resistance can be

met. It should be noted that in most buildings,

a large percentage of the external wall may be

designated ‘unprotected areas’ so that profiled

steel cladding can be used without any fire

resistance requirement

The essential parts of the BS 476 relevant to Corus Products are listed below:

6

Curving

SF500 can be successfully self curved to a

minimum radius of 85M.

Lateral Restraint

With reference to British Standard 5427: 1996

‘Code of Practice for the use of Profiled Sheet

for Roof and Wall Cladding on Buildings’, Part 1

‘Design’ Euroclad trapezoidal external profiles

and Euroclad liner profiles in >.4mm gauge,

fixed according to the recommendations

contained the Euroclad literature (other than

perforated liners), will provide lateral restraint to

the top flange of the purlins. Euroclad liners

used in conjunction with SF500 will therefore

provide lateral restraint.

Thermal Expansion

The rate of expansion for steel is much lower

than that of aluminium and SF500 requires no

special detailing as such to accommodate it.

Steelwork

On very low pitches there may be a build up of

materials at the eaves line due to the inclusion

of closure flashings, gutter flanges etc which

should be allowed for to maintain the fall either

by adjustment of the purlin at the eaves or by

reduction of spacer height etc.

Tolerances acceptable for purlin levels are

as follows:

Secret Fix SF500

Structural movement joints present should be

echoed in the sheeting.

The maximum allowable step at purlin laps or

sleeved joints is +/- 10mm for double skin

situations and +/- 5mm for single skin roofing.

Element Tolerances (in the level of thepurlin relative to the purlinseither side)

Purlin Levels Purlin spacing above designlevel/180 or 10mm (chooselower of these values)

Purlin spacing below designlevel/360 0r 5mm (chooselower of these values)

Purlin Slope +/- 1° (purlins should alwaysbe at 90° to the roof slope)

9

Vapour Control

Following research commissioned by the

MCRMA, the BRE report of Feb 2000 concluded

that “metal liners provide an effective vapour

control layer in twin skinned metal roof

construction. So long as the cladding is installed

to a reasonable standard with a well sealed liner,

it is not necessary to use a separate plastic VCL

or breather membrane in most applications.”

With more complex build-ups in very high

temperature/ humidity buildings extra

precautions are still needed in both built-up and

composite systems. For SF500 double skin

constructions using sealed liner panels the

current recommendations are as follows:

Air Permeability

Correctly installed built-up systems,

incorporating sealed profiled metal liners,

to form an effective vapour control layer in twin

skinned metal roof constructions, can be

expected to achieve an air permeability of

5m3/hr/m3 (at 50 Pascals).

Project specific advice should be sought from

the supplier where separate VCL’s are required

or if there is any doubt as to requirements.

Insulation

There are several materials available, the most

commonly used being mineral fibre and glass

wool quilts. The key factors to look out for in the

insulation are:

Lambda 90/90 thermal conductivity – ensures

that the thermal conductivity complies with CE

regulations, non-combustibility, water

repellent/non-hygroscopic, chemically inert,

rot proof, ease of handling, recyclability, CFC

and HCFC free.

8

Typical View of Built-up System

Rail and Bracket SpacerSystem and Quilt

The Secret Fix sheet may be used in a number

of constructions. In many cases of refurbishment

the substructure is already defined and a system

must be devised which best suits the particular

circumstances of the existing building.

However, in a new construction there are several

systems which are commonly used. The one

illustrated on this page uses the Euroclad liner

panel on the inner skin. The built up system is

an adaption of the standard system, simply

replacing the normal trapezoidal sheet with the

Secret Fix. Perhaps the most commonly used

system for new buildings is the double skin

insulated construction which comprises sealed

inner liner, optional additional VCL, bar & bracket

spacer, insulation and SF500 outer sheet.

Insulation thickness and composition can

be varied to suit design requirements.

Euroclad Liners in 19/1000 and 32/1000 profile

are the most commonly used and are available

in .4mm and .7mm coated steel with Bright

White Liner Enamel finish. Perforated liner

in .7mm can be supplied if required for acoustic

projects. Information on Non Fragility of Euroclad

liners is available in the Liner Profiles Booklet.

Euroclad should be consulted for draft NBS

specifications and details which are tailored to

performance requirements for insulation, vapour

control, acoustics etc and can be further

adapted for project specific requirements.

Secret Fix SF500

Breather Membranes

Work has been carried out by BRE East Kilbride,

in collaboration with the MCRMA, to examine

in detail the factors that determine the risk of

condensation within twin skin metal roofs.

This work has demonstrated that, if a well sealed

liner is used in conjunction with vented fillers for

the outer sheet, only small amounts of

condensation may occur on the external sheet

over the winter and there will not be sufficient

accumulation to cause dripping or running.

Therefore, so long as the cladding is installed

with a high standard of workmanship with

appropriate detailing, especially a well sealed

liner, it is not necessary to install a breather

membrane except in cases where there is likely

to be an unusually high internal moisture load.

HumidityClass

BuildingType

1 Storage areas

2 Offices, shops

3 Dwellings with low occupancy

4 Dwellings with high occupancyie: Sports halls, kitchens, canteens,buildings heated with un-flued gasheaters etc

5 Special buildings ie Swimmingpools, brewerys, laundrys etc

11

Use of Tools

Fixing tools are supplied with every

contract and are refundable upon return.

To ensure that the product is fixed correctly the

following tools are supplied with every contract

for SF500. It is essential that they are used,

and used in the correct manner.

Profile Template

Made of plastic the template is positioned

adjacent to the fixing point whilst the sheet is

being fixed and ensures that no spread of cover

width can occur.10

This section is intended to be a general guide

to principles for fixing the system but is not

exhaustive. The information provided in the

Technical Reference section should be read

in conjunction with the following and further

information and assistance is available from

Euroclad on request.

Unloading and Handling

SF500 sheets are typically of considerable

length and therefore careful arrangements

must be made to avoid damage whilst

handling. Sheets up to 8M long may be

unloaded with forklifts taking care not to

damage the pan of the sheet. It is preferable

to use a lifting beam attachment with slings

if unloading with a forklift where sheets are

over 8M long.

Site Storage

Where sheets are to be stored on the ground

they should be be on a dry, firm base, sloped

to allow drainage and should be protected

from accidental damage and theft.

Lifting

The structures load bearing capacity should

be considered where packs and sheets are

laid on the roof and they must be restrained

from sliding down the slope or being moved

by wind forces.

The sheet underlap should be oriented towards

the direction of lay ready to set out.

A Spreader Beam to assist unloading will be

supplied automatically with all SF500 orders

where sheet lengths are in excess of 8M unless

we are notified otherwise. Spreader beams are

available for sheets up to 60m long.

SF500 sheets up to 8 metres can usually be

successfully loaded to the roof without a lifting

beam. However, longer sheets must be lifted

with a beam and the correct slings.

Sheets over 60m are normally rolled directly

from the rollformer up a ramp to the roof

(as illustrated on page 28). A telescopic ramp

can be hired from Euroclad.

SF500 packs of sheets will be packed in

bundles of 18 sheets, however each pack will

weigh no more than one tonne in total for

shipping by road.

Packs can be produced on-site to 2.5 tonnes

when utilising the Spreader Beam.

Proof Load Test up to 5 tonnes using the 52.5m Spreader Bream.

Turn-up/down-Tool

Carefully designed to turn up the pan of the

profile at the ridge/hip detail.

To turn down the pan of the profile at the

eaves detail.

Secret Fix SF500

The tool is handed and it must be used the

right way around.

Turndown must be a minimum of 10°.

Standard Components

The SF500 system has been designed to

incorporate Standard Accessory components

which should be used to ensure the integrity

of the system.

13

Fixings

The fixings listed are suitable for use with the

system. All those listed are carbon steel.

Stainless steel fixings are also available if required.

Primary Fixings are listed in red,

Secondary fixings are listed in blue.

Details of fixing locations are given below the table.

Primary Fix

Fixes the underlap of the profile to the main

purlin/spacer. Also fixes the bottom flange of the

verge section and the Spacer brackets to the

purlin in the same manner. Illustrated on the

following pages.

Secondary Fix

Application and frequency as follows:

A. Verge detail to sheet. Through the flange of

the verge section, through the mastic sealant

into the crest of the profile, as shown in the

illustrations on the following pages.

B. Ridge/Hip Support Section to sheet.

Through the flange of the profile to the crest

of the sheet, as shown in the illustrations

on the following pages.

C. Flashings to Verge Section through the

2mm x 19mm mastic on the upper flange

of the Verge.

D. Flashings to Ridge/Hip Support Section

positioned between the sheet profile

crests.

E. Drip Angle to sheet pan. Preferably prior

to turning the sheet down. One number

in the sheet pan either side of each side

lap detail.

It is the responsibility of the building designer

to ensure the correct specification of all fixings.

Specific advice regarding the application of

fixings can be sought from Euroclad or

fixing suppliers.

12

65

30

30

*Requirements for these items should be notified as early as

possible to establish availability and lead time. Ridge Support

Sections and Hip Support Section Blanks to be notched out on

site are held in stock in 10A05 Goosewing Grey HPS200 but

other colours availability is subject to stock and lead time. Hip

Support sections precut to suit pitch and angle are available but

subject to lead time and stock.

Fixing details are given on the following page.

Component name Unit Length

*Ridge Support Section 2.020m

*Hip Support Section Blank 3.658m

Verge Section 3.658m

3mm dia Mastic Bead 12m roll

2mm x 19mm Mastic strip 22.5m roll

Ridge Filler 500mm

Eave Filler 500mm

*Raked Hip Ridge Filler Dependent on roof pitchand hip plan angle

*Raked Eaves Filler Dependent on roof pitchand hip plan angle

Secret Fix SF500

Application SFS Reference Frequency

Sheet to Spacer (+ secure bottom of verge)

*SD3-5,5x25 Non-washered 2 fixings at each spacer

Spacer to purlin fixings *SD3-5.5x25 2 fixings per bracket

Verge Section to sheet crown *SL2-T- A14-4.8x20 At 450mm centres

Ridge/Hip Support to sheet *SL2-T- A14-4.8x20 2 fixings at each sheet crest

Drip angle to sheet (Anchor fixing) *6604/6/3W 2 per sheet

Flashing to Ridge Support *SL2-T- A14-4.8x20 At 500mm centres

Flashing to Verge Section *SL2-T- A14-4.8x20 At 600mm centres

Flashing to Hip Support *SL2-T- A14-4.8x20 1 at the centre of each sheetprofile (varies dependent on hip)

Single Skin Application

Sheet to Cold rolled purlin *SD3-5,5x25 2 fixings at each purlin

Sheet to Hot rolled purlin SD14-5.5x32 2 fixings at each purlin

Ridge Support Section

0.7mm Gauge Colorcoat

20mm Diameter holes

Available in 2.020m length

Effective cover width 2.00m

Ridge Filler

Available in 500mm length

The ridge filler should be clipped into the ridge

support section prior to fixing.

Fixed at every crest with two secondary fixings.

The 2mm x 19mm mastic sealant is fixed to the

top face of the section to seal the joint between

the ridge support section and the ridge flashing.

The ridge flashing is fixed to the ridge support at

500mm centres between the crests of the profile.

The end detail allows the overlap over the

adjacent section.

We recommend that these are fixed as the

roof sheets are laid, not left until later.

A

D

G

FE

B

cB & C Viewed From

15

Verge Section

The section shown as ‘Verge Section B’ is in

fact the starter sheet when sheeting the roof

from right to left. The verge section is the first

item fixed to the purlins. Since all subsequently

laid panels are laid parallel to this verge section

it is imperative that it is laid correctly and at right

angles to the purlin. The distance from the edge

of the roof should also be calculated with care

as this will predetermine the position of the last

sheet relative to the other end of the roof. It will

obviously be ideal if the size of the barge board

flashings were the same at each side of the roof

and this can only be achieved by careful setting

out in the initial stages.

The procedure for fixing is as follows. The first

sheet has a strip of mastic laid on the crest as

shown and then is placed into the verge section.

The location of which is best illustrated in the

section drawing.

A fixing is then placed through the verge section

and sealant into the crest of the profile. These

are fixed at 450mm centres. The Fixing Template

is used to secure the sheet while the two Primary

fixings are fixed in to the underlap at each purlin.

A bead of 3mm matic is laid into the sheet

underlap in the grove provided and the next

sheet overlap is snapped over to continue fixing.

The bargeboard flashing is then fixed as

illustrated, again using a strip of mastic sealant.

The procedure for fixing the left hand verge detail

is very similar. It is, of course, the same verge

section reversed. The last sheet is, in this case,

already laid, but not fixed. The bottom flange of

the verge section fits inside the underlap of the

profiled sheet. The mastic and fixing requirements

are as above, or the bead mastic can be used.

14

Setting Out

This operation provides a good opportunity to

check steelwork for tolerances and to ensure

that the design roof pitch has been achieved,

particularly at the ridge and eaves. To ensure

that the system is set out correctly the fixing

template must be employed and used correctly.

Typical SF500 Roof

Secret Fix SF500

View of Verge Section B

Section of Verge B

View of Verge Section C

Section of Verge C

The SF500 sheets install to a nominal cover

width of 500mm. Care should be taken when

setting out to avoid variation between SF500

and liner panel cover width particularly where

rooflights are to be incorporated.

Sheet pan onlyturned up

150mm minimumclearancerecommended forturn up operation

17

Eaves

The eaves detail incorporates a filler which

is usually positioned above the drip angle.

The eaves flashing shown here is used in

conjunction with a built up system using

Euroclad liner panel. The detail shown is fairly

typical but there are many variations on the

same theme.

The last 25mm of the trough is turned down

using the tool provided, which stiffens the profile

in the critical area and reduces the incidence

where water is held on the reverse of the sheet.

Anchor fixings together with their flashing,

in addition to securing the end of the sheet,

also provide an opportunity to place the small

flute filler securely.

16

Ridge Detail

The ridge support detail, together with its filler,

is designed to be fitted at 90° to the length of the

sheet in a convenient position close to the apex.

The filler clips into the ridge support and they

are fixed to the crest of the profile in the manner

shown in the illustration. It is important to

exercise great care when installing the mastic to

ensure a continuous bead in the position shown.

The illustration also reveals the pan of the profile

turned up at the very top of the sheet. Thus, a

secondary barrier is created. All sheets have the

pan turned up in the same manner under the

ridge flashing. A tool is available from Euroclad

to facilitate the up turn.

The normal ridge flashing may then be fitted

and fixed to the top flange of the ridge support

detail, as illustrated. Care must be taken not to

penetrate the crest of the profile when fixing

the ridge to the ridge support.

The ridge support detail must be fixed in

conjunction with the profile as any spread or

shrinkage of the sheet will then be immediately

evident and corrective action should be taken.

Secret Fix SF500

Not shown turned up

View of Ridge Detail A

Section of Ridge Detail A

View of Eaves Gutter G

19

Hip Detail

The hip is perhaps the most difficult section

to detail for the secret fix systems. They usually

involve very costly sections which add

significantly to the overall budget. Euroclad’s

system is straightforward and cost effective.

Essentially a modification of the ridge support

detail, the pitch of the notches and their shape

vary with the pitch of the roof and the angle of

the hip.

A ‘blank’ is supplied which is notched out by

the contractor on site to fit the profile.

The procedure for fixing is identical to that of

the ridge support.

The pan of the profile is turned up by the

Sheeting Contractor on-site.

18

View of Valley Gutter F

Secret Fix SF500

Section of Valley Gutter F

Allowance should be made to turn down the

trough of the profile and incorporate the flashing

to which the anchor fixings are attached.

The location of the anchor fixings allows the

opportunity to place the small flute filler nearer

the end of the sheets, if required. An alternative

flashing detail is shown here to that shown on

the Eaves gutter. In all cases the anchor fixing

must be applied.

Fixing the drip angle prior to turning

the sheet pan down is recommended.

The Valley Gutter detail, as illustrated, includes

the use of the Euroclad liner panel although the

principals of the construction could be amended

to exclude it if required.

Individual circumstances will predetermine which

details are applicable, but the arrangement

illustrated includes the basis of the construction.

The small flute filler will be fixed in the position

above the last spacer or the drip angle where

the anchor fixings are located.

Section of Hip Detail D

View of Hip Detail D

Sheet turned down

21

Rooflights

Curving

When self curved to minimum 85M radius,

an additional stitcher screw should be

used to secure the sheet overlap to

underlap. This fixing should be fitted on the

crown of every overlap over the gutter (ie: as

near to the end of the sheet as practical and

below the drip angle outside the insulated area).

Rooflights

A common form of roof penetration requiring

careful attention is the rooflight. Attention should

be paid to cover widths during installation of

both liners and SF500 sheet to avoid

misalignment in rooflight details.

There are a wide range of rooflights available to

suit SF500 in both GRP and Polycarbonate from

a number of manufacturers. There are two types

of standard rooflight available for SF500,barrel

vault and in-plane throughfixed.

A. Rooflights with no Primary Fixings

Where the use of primary fixings penetrating the

outer skin is prohibited the Barrel Vault rooflight

is the only satisfactory answer. One such system

is illustrated below. The extra cost of such an

item is compensated by the units integrity. The

item illustrated is manufactured in sections to fit

any size of roof opening. They must start at or

very near to the ridge but can be terminated

whenever required down slope. The system

drawing illustrates one particular type.

B. Rooflights with visible fixings

There is only one type of rooflight which can be

incorporated into the SF500 system if primary

fixings penetrating the weather sheet are

acceptable.

1000mm Cover Width

The sheet is suitable if a site assembled light

is required. The liner translucent is fixed by the

normal method. The outer sheet is a trapezoidal

shape with two side overlaps. Again primary

fixings penetrate the sheet (as illustrated) at

every purlin. End laps are possible but not

recommended below 5°. The appropriate

washers must be used with the primary fixings.

The sheet must run from ridge to eave.

A secondary translucent may be required to

form a “triple skin” system for compliance with

the building regulations.

20

Section of Hip Gutter

Rake cutting of the sheet must be carried out

with the utmost care since the profile is difficult

to cut neatly. The angle of the hip will determine

the distance between the main profiles and this

could increase the effective pitch of the profile

considerably.

The support/drip flashings can be manufactured

in plain galvanised steel up to 1.6mm thick to

give the support necessary.

View of Hip Gutter E

Section of Hip Gutter E

Secret Fix SF500

23

Other Penetrations

There are an infinite number of reasons for roof

penetrations, but where possible, on a Secret Fix

roof of low (below 5°) pitch, they should be

avoided. Inevitably it will be necessary to

accommodate such details and, with care,

satisfactory solutions can be achieved.

Two examples of the type of penetrations which

are most common are illustrated. The detail of

the flashing must be such that the troughs

should not be blocked.

If the penetration is of a diameter and position

that a trough would be completely filled then

this must be detailed back to the ridge capping,

as illustrated.

Where large penetrations are necessary it

is possible to use ridge support sections

to support the flat areas of flashing.

Note: As with any large penetration, structural

trimmers may be required to support the

built-up system.

Roof Penetrations

Section through large roof Penetration

General view of large roof Penetration

22

Roof Access

F500 is designed as a low maintenance system

but generally the sheets can be walked upon

without imposing damage. However, care should

be taken on precoated material not to damage

the coating.

Fall Arrest Systems

Design Considerations – General.

Take the following into consideration when

choosing, designing and specifying a

Fall Arrest/Restraint system for SF500:

• Always use non-penetrative systems

• Identify the areas of the roof which

require access for cleaning, maintenance

or inspection

• Give consideration to safe access points

and ground clearance, whilst keeping the

system more than 2 metres from the

nearest hazard where possible

• Review anticipated or actual work patterns

to determine the number of workers

required to use the system simultaneously.

Latchways

Euroclad’s approach to the market requires

a commitment to quality and innovation which

is reflected in Latchways ManSafe® system

utilising the Constant Force™ post.

The system has been tested for use with

Euroclad Secret Fix SF500.

Latchways plc is the world leader in the design

and manufacture of cable based fall arrest

systems offering continuous protection to

individuals working at height. Their products

are made using the highest quality components

and meet or exceed all appropriate national,

European and international standards and

legislation.

All Latchways systems are CE marked and

hold EC Declarations of Conformity. Latchways

is also a BS EN ISO 9002 certified company.

Ongoing advice and support is available from

your local installer or from Latchways on:

+44 (0)1380 732700.

Secret Fix SF500

General view of small roof Penetration

2524

It is the very nature of the Secret Fix system

that makes the successful achievement of

an end lap virtually impossible. It is in certain

circumstances however, sometimes impossible

to fix one sheet from ridge to eave.

One can think of examples such as excessive

roof slopes or problems with access which

demonstrate this point.

Euroclad have designed a step detail which

allows the specifier the advantage of using the

Secret Fix system where previously the length

of sheet required would have been prohibitive.

Using standard components the detail illustrated

reveals a strong, easily fixed effective step.

Should you require any advice on incorporating

this feature, please contact the sales office.

Traditionally a problem with Secret Fix systems is

the replacement of a damaged sheet, particularly

if it is in the middle of a long run of sheets.

This problem was addressed at the design stage

of SF500 and as a result, replacement is

straightforward and relatively painless.

The most important factor in replacement is

ensuring that the adjoining sheets are not

damaged in the process, necessitating another

replacement. There are several methods but the

one that Euroclad recommended is as follows:

Cut along the whole length of the damaged

sheet approximately in the positions shown in

the below diagram as ‘A’ and ‘B’. Once

completed, carefully remove the pan of the profile

with particular regard to the sharp cut edges.

Gripping the remainder of the sheet at ‘A’ it will be

straightforward to ‘unclip’ the overlapping edge.

With great care to avoid damage to the adjoining

sheet’s overlap, gently prise away the remaining

section left by the cut at ‘B’. This will then allow

access to the primary fixings in the underlap.

The old underlap section can then be removed.

During replacement it is important to ensure

that all the old mastic is removed and a new

bead laid. Laying of the new sheet will be then

straightforward.

Secret Fix SF500

500mm cover width

colour side AB

Roof Step Replacing Damaged Sheet

27

Secret Fix SF500

26

On-Site Production

All Euroclad site produces SF500 Secret Fix

projects have pre-production site visit to discuss

Euroclads’ and the Contractors requirements and

responsibilities on site. A Site Specific Method

Statement will be provided for The Roofing

Contractor and Main Contractor.

Coil Delivery

A delivery of coils will be sent to site on projects

larger than 500m2 (based on 0.7mm material).

The Contractor must supply a counterbalance or

telescopic truck to unload the coil into a prepared

safe area on arrival to site. Coils weigh a maximum

of 2.5 tonnes.

Mobile Rollforming Trailer

Trailer Details:

Length: 15.30 metres

Height: 4.04 metres

Width: 2.60 metres

Weight: 33 tonnes (approx)

Producing Sheet Lengths up to 44 metres

Manpower

Euroclad will supply manpower to produce

sheets lengths up to 18 metres without labour

assistance from the Contractor. For sheet

lengths over 18 metres up to 30 metres 3

labourers are required to assist the rollforming

team. For lengths over 30 metres up to 44

metres 5 labourers will be required.

Work procedure

The rollformer will arrive on site and set up in

the required location as determined in the

pre-production site visit for rollforming sheets.

The rollforming team after attending any

required Site Induction will then produce the

sheets and pack at ground level onto

Loading SF500 packed into crates – available for sheetlengths upto 6 metres by request. Pallet charges apply.

polystyrene bearers and then secure the sheets

for ready for lifting with a nylon banding system.

All cut lengths are required 10 working days

before site commencement.

The process can then be completed at different

locations around sites (where required) to keep

crane size requirements down – and in-turn

cranage costs.

Producing Sheet Lengths over 44 metres

Manpower

Euroclad will supply manpower to produce

sheets to the ramp and up to the roof height.

The roof area is the responsibility of the

Contractor. The roof area must be prepared

before production commences.

Careful planning will ensure trouble free

site operation.

NB. All loading of the roof area will be the

Contractors responsibility.

Work procedure

The rollformer will arrive on site and set up

in the required location ready for ramp set-up.

Before the ramp is erected it is possible to

relocate it into position using lifting slings along

with a Telescopic Fork Truck. The ramp is then

erected using the on board motorised controls.

Assistance may be required.

For further details please contact the On-site

Production Department at Euroclad.

The Euroclad Mobile Ramp

The Mobile telescopic ramp enables Euroclad to

produce sheets in excess of lifting restrictions

with ease to the roof. SF500 sheets have been

produced in single lengths up to 87 metres long.

The loading equipment ramp is available for hire

on a weekly basis for loading Euroclad

products only.

28

Euroclad Limited

Wentloog Corporate Park

Cardiff

CF3 2ER

Telephone +44 (0)29 2079 0722

Facsimile +44 (0)29 2079 3149

E-mail sales@euroclad.com

Internet www.euroclad.com

Euroclad (Ireland) Limited

Unit 4

Newhall Industrial Estate

Naas

Co. Kildare

Telephone 00 353 (0) 45 435 470

Facsimile 00 353 (0) 45 435 472

Internet www.euroclad.com

The details and information contained in this publication are correct at time of going to press. Euroclad reserves the right to change details andspecifications without prior notice. No responsibility is assumed for errors or misinterpretations resulting from the information contained in this publication.Typical construction details are illustrative only and no liability is accepted.